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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Large transport descended below assigned altitude of 16000 ft. Flying first officer lost concentration.
| Attributes | |
| ACN | 357100 |
| Time | |
| Date | 199612 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ngo |
| State Reference | FO |
| Altitude | msl bound lower : 15600 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : rjtg |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 250 flight time total : 11000 flight time type : 650 |
| ASRS Report | 357100 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The first officer was flying and we received a descent clearance to 16000 ft MSL. After reaching 16000 ft, the captain reported level. At that time, the captain and myself began reviewing the arrival procedures. A few moments later, we had an altitude alert and a call from ATC about our altitude. While the captain and I were reviewing the procedure, the first officer made a gradual descent to 15600- 15700 ft. He corrected back to 16000 ft. He became in tune to our discussion and failed to maintain altitude. A higher situational awareness would prevent such a recurrence.
Original NASA ASRS Text
Title: LGT DSNDED BELOW ASSIGNED ALT OF 16000 FT. FLYING FO LOST CONCENTRATION.
Narrative: THE FO WAS FLYING AND WE RECEIVED A DSCNT CLRNC TO 16000 FT MSL. AFTER REACHING 16000 FT, THE CAPT RPTED LEVEL. AT THAT TIME, THE CAPT AND MYSELF BEGAN REVIEWING THE ARR PROCS. A FEW MOMENTS LATER, WE HAD AN ALT ALERT AND A CALL FROM ATC ABOUT OUR ALT. WHILE THE CAPT AND I WERE REVIEWING THE PROC, THE FO MADE A GRADUAL DSCNT TO 15600- 15700 FT. HE CORRECTED BACK TO 16000 FT. HE BECAME IN TUNE TO OUR DISCUSSION AND FAILED TO MAINTAIN ALT. A HIGHER SITUATIONAL AWARENESS WOULD PREVENT SUCH A RECURRENCE.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.